:root{color-scheme:light;--ink:#1d1d1f;--muted:#59595f;--blue:#0066cc;--line:#d2d2d7;--canvas:#f5f5f7}*{box-sizing:border-box}html{scroll-padding-top:100px}body{margin:0;color:var(--ink);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:17px;line-height:1.65}::selection{background:#d6e9ff;color:#102c4c}a{color:var(--blue);text-underline-offset:4px}a:hover{text-decoration:underline}a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}img{max-width:100%;display:block}.shell{width:min(1240px,calc(100% - 80px));margin:auto}.header{border-bottom:1px solid #e8e8ed;background:#fff}.header nav{min-height:72px;width:min(1240px,calc(100% - 80px));margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-weight:650;font-size:21px;letter-spacing:-.03em;color:var(--ink);text-decoration:none}.nav-links{display:flex;gap:30px;font-size:14px}.nav-links a{color:var(--ink);text-decoration:none}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 24px;border-radius:999px;background:#0071e3;color:white;text-decoration:none;line-height:1.35;font-size:16px}.button:hover{background:#0066cc;text-decoration:none}.compact{min-height:40px;padding:9px 19px;font-size:14px}.breadcrumb{display:flex;gap:12px;padding-top:34px;color:var(--muted);font-size:14px}.breadcrumb a{color:var(--muted)}.hero{padding:55px 0 75px}.with-photo{display:grid;grid-template-columns:1.08fr 1fr;gap:65px;align-items:center}h1,h2,h3{line-height:1.13;letter-spacing:-.03em;text-wrap:balance}h1{font-size:clamp(40px,4.6vw,68px);margin:0 0 27px;font-weight:650;max-width:18ch}.article-hero h1{max-width:20ch}.intro{font-size:21px;line-height:1.55;color:var(--muted);margin:0;max-width:66ch}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:20px;margin-top:30px}.plain-link{font-size:16px}.hero-photo{margin:0}.hero-photo img{width:100%;height:auto;aspect-ratio:1/1;object-fit:cover;border-radius:14px}.hero-photo figcaption{margin-top:12px;font-size:13px;color:var(--muted)}.content-layout{display:grid;grid-template-columns:minmax(0,760px) 260px;gap:90px;border-top:1px solid var(--line);padding:58px 0 30px}.reading-section{margin-bottom:64px}.reading-section h2{font-size:32px;margin:0 0 24px}.reading-section p{max-width:74ch;margin:0 0 18px}.spec-list{margin:0}.spec-list>div{display:grid;grid-template-columns:180px 1fr;gap:26px;border-top:1px solid var(--line);padding:23px 0}.spec-list dt{font-weight:600;line-height:1.5}.spec-list dd{margin:0;color:var(--muted)}.steps{padding-left:25px;margin:0}.steps li{padding-left:12px;margin-bottom:30px}.steps li::marker{font-weight:600;color:var(--blue)}h3{font-size:22px;margin:0 0 12px}.steps p{color:var(--muted)}aside h2{font-size:18px;margin:0 0 22px}aside a{display:block;margin-bottom:20px;font-size:16px}aside p{font-size:14px;color:var(--muted);padding-top:20px;border-top:1px solid var(--line)}details{border-top:1px solid var(--line);padding:20px 0}details:last-child{border-bottom:1px solid var(--line)}summary{font-weight:600;cursor:pointer;line-height:1.5}details p{padding-top:18px;color:var(--muted)}.closing{padding:54px 58px 60px;background:var(--canvas);margin-bottom:70px}.closing h2{font-size:38px;margin:0 0 20px}.closing p{max-width:62ch;color:var(--muted);margin-bottom:25px}footer{border-top:1px solid var(--line);padding-top:28px;padding-bottom:35px;display:flex;justify-content:space-between;gap:24px;color:var(--muted);font-size:14px}footer p{margin:0}footer a{display:block;margin-bottom:8px}.skip-link{position:absolute;top:8px;left:10px;transform:translateY(-200%);background:#fff;padding:12px;z-index:10}.skip-link:focus{transform:none}
@media(max-width:1050px){.content-layout{gap:45px;grid-template-columns:minmax(0,1fr) 220px}.with-photo{gap:35px}h1{font-size:48px}.nav-links{gap:18px}.spec-list>div{grid-template-columns:150px 1fr;gap:20px}}
@media(max-width:760px){.shell,.header nav{width:calc(100% - 40px)}.header nav{gap:14px;flex-wrap:wrap;padding:16px 0}.nav-links{order:3;width:100%;font-size:14px;gap:24px}.breadcrumb{padding-top:25px}.hero{padding:36px 0 45px}.with-photo{grid-template-columns:1fr;gap:36px}h1{font-size:40px;max-width:17ch}.intro{font-size:19px}.hero-photo img{aspect-ratio:4/3}.content-layout{grid-template-columns:1fr;gap:0;padding-top:40px}.reading-section{margin-bottom:45px}.reading-section h2{font-size:28px}.spec-list>div{grid-template-columns:1fr;gap:8px;padding:20px 0}aside{border-top:1px solid var(--line);padding:30px 0}aside p{max-width:50ch;border:0;padding-top:0}.closing{padding:32px 24px;margin:10px 0 40px}.closing h2{font-size:30px}footer{display:block}footer>div{margin-top:20px}.actions{gap:18px}}
@media(prefers-reduced-motion:no-preference){.button{transition:background .15s ease}}
[hidden]{display:none!important}.nav-actions{display:flex;align-items:center;gap:14px}.locale-picker select{font:inherit;font-size:13px;min-height:40px;max-width:120px;padding:6px;border:1px solid #d2d2d7;border-radius:8px;background:#fff;color:#1d1d1f}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.article-meta{font-size:13px;color:#59595f;margin:0 0 24px}.hero-photo img{aspect-ratio:1.4;height:auto}.privacy-copy{max-width:74ch;font-size:14px;color:#59595f}.privacy-copy h2{font-size:22px}.plain-button{border:0;background:transparent;color:#0066cc;font:inherit;text-align:start;padding:8px 0;cursor:pointer}button:focus-visible,select:focus-visible{outline:3px solid #0066cc;outline-offset:4px}button{font-family:inherit;cursor:pointer;border:0}a,button,select{touch-action:manipulation}p,dd{overflow-wrap:anywhere}h1,h2,h3{text-wrap:balance}.nav-links a{max-width:24ch;line-height:1.4}.spec-list dd{min-width:0}.actions small{font-size:12px}.breadcrumb{flex-wrap:wrap}html[dir=rtl] .steps{padding-right:25px;padding-left:0}html[dir=rtl] .steps li{padding-left:0;padding-right:12px}html[lang=ar] h1{line-height:1.35}html[lang=zh-CN] h1,html[lang=ja] h1,html[lang=ko] h1{line-height:1.2;font-size:clamp(36px,4.4vw,64px)}
@media(max-width:1050px){.header nav{flex-wrap:wrap;padding-block:16px}.header .nav-links{order:3;width:100%;gap:30px}}
@media(max-width:760px){.header nav{gap:12px}.nav-actions{gap:10px}.locale-picker select{max-width:105px}.compact{padding:9px 14px}.header .nav-links{gap:22px}.header .nav-links a{max-width:48%}.hero-photo img{aspect-ratio:1.4}.article-meta{line-height:1.6}.shell{width:calc(100% - 40px)}h1{overflow-wrap:anywhere}.closing h2{font-size:30px}}